Ovarian Endometrioma (Chocolate Cyst) · Cystectomy vs Ablation

Step-by-step decision

Choose step by step as prompted; reaching an endpoint gives the management recommendation. You can go back a step or restart anytime.

Full pathway

1. [Decision] Symptoms/size + ovarian reserve/bilateral + fertility + exclude malignancy
   Symptoms/size? Ovarian reserve (AMH)/bilateral? Fertility wish? Malignancy excluded? (Preoperatively exclude malignancy by ultrasound (O-RADS); all surgery harms ovarian reserve to some degree, bilateral/repeat surgery is higher risk, counsel on AMH.)
   • Symptomatic or large, reasonable ovarian reserve, unilateral → Symptomatic/unilateral good reserve → cystectomy
   • Low ovarian reserve, bilateral, recurrent, or fertility/IVF prioritized → Low reserve/bilateral/fertility → ablation to preserve reserve
   • Asymptomatic, small cyst, benign imaging → Asymptomatic small cyst → surveillance
   • Planning IVF, no pain/not large, clear diagnosis → Planning IVF → no routine surgery first
2. [End] Symptomatic/unilateral good reserve → cystectomy
   Symptomatic or large, reasonable reserve, unilateral → cystectomy (stripping): better recurrence and pain control than drainage/ablation, and obtains pathology; the trade-off is some decline in ovarian reserve (AMH), minimize electrocautery and use meticulous hemostasis to protect reserve.
3. [End] Low reserve/bilateral/fertility → ablation to preserve reserve
   Low ovarian reserve/bilateral/recurrent/fertility-prioritized → ablation (CO2 laser/plasma energy) or partial cystectomy + ablation combined, to preserve ovarian reserve; slightly higher recurrence than pure cystectomy, weigh and counsel fully.
4. [End] Asymptomatic small cyst → surveillance
   Asymptomatic, small cyst, benign imaging (O-RADS) → surveillance (serial ultrasound), no rush to operate; reassess if it enlarges, develops suspicious features or symptoms.
5. [End] Planning IVF → no routine surgery first
   Planning IVF, no pain, cyst not large, clear diagnosis → no routine surgery first (surgery does not improve IVF outcomes and harms reserve); only consider pre-treatment if pain is severe, the cyst is large, it impedes oocyte retrieval, or the diagnosis is unclear.

Source guidelines & references

• Ovarian endometrioma management (ESHRE endometriosis guideline 2022; cystectomy vs ablation and ovarian reserve)

This pathway is our own synthesis of the decision logic in the guidelines above (not the guideline verbatim); thresholds and workflows change as guidelines update — in practice follow the latest guideline, your institution's protocol and the individual patient.

Other pathways